*{margin: 0;padding: 0;list-style-type: none;text-decoration: none;}
.div1{width:500px;height: 50px;padding: 40px 0;position: relative;margin: auto;}
.div2{width: 500px;height:40px;background:#ccc;margin: 0 auto;border:5px solid #0ff;position: relative;overflow: hidden;}
ul{width:500px;height:40px;left:0;top:0;position: absolute;}
li {width: 500px;height: 40px;float:left;}
p{width:500px;height:40px;line-height: 40px;font-size: 20px;text-align: center;}
